From: "Xing, Beilei" <beilei.xing@intel.com>
To: Qiming Chen <chenqiming_huawei@163.com>,
"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-stable] [PATCH 20.11] net/i40e: extend the polling times of vf reset
Date: Wed, 8 Sep 2021 03:15:39 +0000 [thread overview]
Message-ID: <MN2PR11MB3807B31AD3C97FB35FC1826AF7D49@MN2PR11MB3807.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20210906071345.9939-1-chenqiming_huawei@163.com>
> -----Original Message-----
> From: Qiming Chen <chenqiming_huawei@163.com>
> Sent: Monday, September 6, 2021 3:14 PM
> To: stable@dpdk.org
> Cc: Xing, Beilei <beilei.xing@intel.com>; Qiming Chen
> <chenqiming_huawei@163.com>
> Subject: [PATCH 20.11] net/i40e: extend the polling times of vf reset
>
> In the embedded RTOS environment, the x722 controller Ethernet card of the
> d2146nt chip, the vfio user mode driver takes over 8 vf ports in turn, but
> i40evf_check_vf_reset_done will probably fail.
>
> This issue has been discussed with intel&dpdk experts for 3 rounds before,
> and the version matching is no problem, and there is no substantial progress.
> The official website contacted external experts, but there was no response
> afterwards. Learning from the implementation of the i40evf kernel driver
> locally, after modifying the polling time from 1 second to 5s, the repeated
> restart process took over the start port test, and it was found that this
> probability was reduced to an order of magnitude acceptable to the user.
This detail segment of communication between PAEs can be removed.
>
> The patch cannot fundamentally solve the failure problem, but it greatly
> slows down the probability of the problem. The modification is based on the
> i40evf kernel driver.
>
> Fixes: 5c9222058df7 ("i40e: move to drivers/net/")
I think the fix commit id is 4861cde4611601ccc9d467675f9d7a10c3095b54 (i40e: new poll mode driver)
> Cc: stable@dpdk.org
>
> Signed-off-by: Qiming Chen <chenqiming_huawei@163.com>
> ---
> drivers/net/i40e/i40e_ethdev_vf.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/i40e/i40e_ethdev_vf.c
> b/drivers/net/i40e/i40e_ethdev_vf.c
> index f64db72e9a..924da8dfb4 100644
> --- a/drivers/net/i40e/i40e_ethdev_vf.c
> +++ b/drivers/net/i40e/i40e_ethdev_vf.c
> @@ -42,7 +42,7 @@
> /* busy wait delay in msec */
> #define I40EVF_BUSY_WAIT_DELAY 10
> #define I40EVF_BUSY_WAIT_COUNT 50
> -#define MAX_RESET_WAIT_CNT 20
> +#define MAX_RESET_WAIT_CNT 100
>
> #define I40EVF_ALARM_INTERVAL 50000 /* us */
>
> --
> 2.30.1.windows.1
next prev parent reply other threads:[~2021-09-08 3:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-06 7:13 Qiming Chen
2021-09-08 3:15 ` Xing, Beilei [this message]
2021-11-08 11:49 ` Xueming(Steven) Li
2021-11-08 12:08 ` Xueming(Steven) Li
2021-09-08 3:17 ` Xing, Beilei
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